Kiln truck



' July 19, 1927. 1,636,073

H. M. ROBERTSON KILN TRUCK ri inal Filed June 192 2 Sheets-Sheet 1 liq-.1.

INVENTOR 44mm,, imam ATTORN EY July 19, 1927. 1,636,073

H. M. RQBERTSON KILN TRUCK Original Filed June 20, 1925 2 Sheets-Sheet 2 I I v :f INVENTOR 67. 2 Z: ig 1- 0m ATTORN EV the material or bodies may be moved in Patented July 19, 1927.

EABIBY I. ROBERTSON, 0F L'AKEWOOD, OHIO.

PATENT OFFl mu rnucir.

Original application iiled dune 8d, 1825, Serial No, 58,589. Divided and this application filed September 21, 1925. Serial No. 57,758. 1

This invention relates to a truck, holder or conveying device of use in kilns, particularly kilns of the continuous type.

1 This ap licationis a division of my application erial No. 38589, filed June 20, 1925 which has become Patent 1,621,222.

One object of the invention is toprovide an improved truck, holder or conveying de vice for material to be heated .or treated in a chamber, such as a continuous kiln.

Another object of the invention is to construct an im roved holder for materials formed entire y from refractory materials, whereby it is capable of being repeatedly used in kilns and for other requirements where high tem eratur'e conditions exist without dangero? deterioration or damage either by reason of high temperatures orexposure, to atmospheric conditions. Another objectof the invention is to pro-' vide an improved truck or holder of this type' that is readily and economically made. Other objects of the invention will be apparent to those skilled in the art to which my invention relates from the following'description taken in connection with the ac-' companying drawings, wherein Fig. 1 1s a side view of a truck or holder embodying my invention.

Fig. 2 is a perspective view of a truck (wheels for the truck being omitted.) having a holder for the. material.

Fig. 3 is a perspective'view of a truck (the wheels therefor being omitted) hav inga holder of slightly dillerent form from that shown in Figs. 1 and 2.

Fig. 4 is a longitudinal sectional view of the truck and holder shown in Fig. 3. i

Fig. 5 is aperspecti've viewof a truck (the wheels therefor being omitted) having a holder different in construction from that shown in Figs. 1, 2 and'3. v In the drawings, 1 indicates as an entirety a truck for the material or'bodies to be treated, for'example limestone, whereby and through heated and cooled zones (either or'both). The truck comprises a casting 2","

a base portion3 and a holder 4. The casting 2 consists of a frame having strengthentending ribs. When the trucks lower temperatures therein and ing ribs 56* and a flange 56 extending along its sides" and ends and pairs of depending plates 57 forming bearings for axles 58. The axles 58 carry supporting wheels 5,, the peripheries of which are shaped to engage suitable tracks 14, which extend from a point utside a kiln into and the'rethrough, sothat the truck may be moved through the kiln in loaded condition. The base portion 3 is supported on the frame 2. The base portion is formed of refractory blocks, such as bricks 61 (as shown in Fi 1, 2, 3 and 4) or tile 62 (as shown-in Fig. 5). The bricks or blocks 61 rest on the frame 2 and lit within the flange-56" thereof. The upper surface of the base portion 3 is shaped to form inclined bases 60, extending from the longitudinal side edges of the base portion downwardlyto alongitudinal line extending. centrally thereof. The purpose of this construction'will later ap car. At'

63 the opposite'end walls 'of the ase portion 3 are provided with transversely exare being moved through the kiln or other chamber, the ribs 63 overlap each'other' and thus close the space between the truck ends to prevent the heat in'and passing through the-kiln radiating downwardly and affecting the axles, the bearings therefor and wheels. As shown, the ribs 63 on the front and rear end walls of each truck'are off-set one relative to the other so that the ribs on adjoining trucks will overlap each other for this purpose.

The truck holder 4 comprises a bottom 64, side walls 65 and supporting members 66 all of which are constructed .from blocks 67 and slabs 68. each formed from suitable fire clay capable of resisting the hi h temperatures required in the; kiln in 'urning the limestone or other material and exposure to the air at normal temperature without danger of breakage; thereb rmitting the trucks to be. moved through t e kiln and then into. the

open and subjected to normal atmos heric conditions. The blocks 67 preferab y extend transversely of the base portion 3, being arranged in rows, each row spaced from the other row or rows, to permit the heat to circulate beneath the bottom 64 and side walls 65; also, the blocks in each row constitute a series or set so that their lower surfaces may engage the incline bases and their upper surfaces support the slabs .68 in the manner shown. The side walls 68 are inclined inwardly and downwardly, thus serving to increase the carrying capacity of the truck, at

the same time leave a relatively large area of the material exposed to the heat and roducts of combustion, as well as to permit the ready escape of the carbon dioxide and other vapors from the material. The bases 60 be ing inclined downwardly and inwardly, they prevent lateral sliding of the blocks 67 on the base portion, and hence insure the assembly of the slabs in position. The slabs 68 forming the side walls are inclined sufficiently to maintain a maximum load without affect- I ing the accessibility of the heat and products of combustion to the material or free escape therefrom of the vapors given off incident to the burnin action. It will be seen from Figs. 1 an 2 that the bottom 64' and side walls 65 extend from end to end of the truck body 2 or base portion 3, so that they may substantially abut the corresponding walls of the adjacent trucks. As a result, -the loading of the trucks maybe carried on com holder; also "that the blocks 67 are shaped to sn gport t e slabs 68 and 69 in the position own.- Fig. 5 also. shows a further modification which may. he used in connection with either form of holder, in that the base portionis constructed of fire-clay blocks instead of bricks.

. Where it is desired to provide the holder 4 with end walls I construct it as shown at 13' -see Figs. 3 and 4. In these views. I provide blocks 7 0', 71, shaped to fit the slabs 68' forming the bottom 64 and side walls 65 The blocks 70, 71, may rest on the slabs 68", or they ma be formed integrally with the end row 0 blocks 67, in which event the blocks have an off-set portion 67 to form a seat for the adjacent slabs 68. By fitting the base portion 3 of the holders within the flange 56", the latter will lie beyond the refractory base portion and thus engageeach other to effect movement of the trucks through the kiln 1 without contact with the refractory walls. Danger of breakage of these walls is therefore eliminated.

or hopper, but'the form shown in Figs. 1, 2

It be understood that either form of truck or holder may be loaded from a chute and 5 has certain advantages, to wit, the walls of the holder on which the material is supported abut each other so that during movement of the'truck through the kiln they co-operate to form a continuous holder and" 'sembled and replaced.

By constructin the body portion and holding portion 0 the truck from fireresisting material or materials, it may be positioned in and passed through zones that are maintained at relatively. hlgh temperatures and then removed therefrom without danger of bein affected by sudden'atmosphcricchanges. t will therefore be seen that the holding portion of the truck may be provided with side walls and also with end walls,- if desired so that a relatively large quantity of material may be conveyed through the kiln.

To'those skilled in' the art .to which my invention relates, many changes in construction and widel difiering embodiments and applications 0 my invention will suggest themselves 'without departing from the spirit and scope thereof. My disclosures and the description herein are purely illustrative and arenot intended to be in any sense limiting.

What I claim is:

1; A truck for use in apparatus having a heated chamber comprising a whee1 mounted frame, a base portion on said frame, sup.- portin refractory blocks on said base ortion, t e engaging faces between saidv ase portion and said blocks being com lementary and co-acting to prevent outwar move- .ment of said blocks, and refractory walls restin on said blocks and arranged to form a hol or for material.

2. A truck for use in apparatus having a heated chamber comprising a wheel mountedfra'me, a base portion on said frame, setsof supporting refractory blocks, each set comprising a center member and end members, the engaging faces betweensaid base portion and said blocks of each set being complementary and co-acting to prevent outward movement of the blocks and refractory walls'restin -on said blocks and arranged to form a ho der for material. 3. A truck for use in apparatus having a heated chamber comprising a wheel suported frame, a base'portion on said frame ormed with bases inclined downwardl from its side edges to a central line exten III ing longitudinally of said base portion, suptory material disposed along the opposite porting refractory blocks shaped to fit said ends of said bottom and side walls. inclined bases, and refractory walls rest- 5. A truck as claimed in claim 3 in which ing on said blocks'and arranged to form a the supporting refractory blocks are ar- 5 holder for materials. ranged in transversely extending spaced ll 4. A truck for use in apparatus having a rows.

heated chamber comprislng a wheel sup- In testimony whereof, I have hereunto ported frame and a holder having bottom afiixed my signature. and side walls formed from a refractory 10 material and end walls formed of refrac- HARRY M. ROBERTSON. 

